Introduction To Sis - Extron electronics RGB-DVI 300 User Manual

Serial Communications

Introduction to SIS

Both the RGB-DVI 300 and the RGB-HDMI 300 accept SIS
commands from a host device such as a computer running the
HyperTerminal utility or other control system. The host device
can be connected to the 3-pin captive screw connector on the
rear panel or to the Config port on the front panel. To connect
to the config port, use the optional Extron 9-pin D female to 2.5
mm TRS Configuration cable (part # 70-335-01).
The protocol is 9600 baud, 8 data bit, 1 stop bit, and no parity.
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SIS commands consist of a string (one or more characters per
command field). Unless otherwise stated, upper and lower
case characters may be used interchangeably. Commands do
not require any special characters to begin or end the command
string. Each response from the video converter ends with a
carriage return and a line feed (CR/LF =
end of the response character string.
When the RGB-DVI 300 or RGB-HDMI 300 is first switched on,
depending on the model, it sends the message:
(c) COPYRIGHT 2009, EXTRON ELECTRONICS,
RGB-DVI 300, V x.xx, 60-906-01
(c) COPYRIGHT 2009, EXTRON ELECTRONICS,
RGB-HDMI 300, V x.xx, 60-907-01
where V x.xx is the firmware version number and 60-90x-01 is
the part number.
RGB-DVI 300 and RGB-HDMI 300 • Serial Communications
4-2
™
The wiring in the RS-232 cables crosses over so that
the video scaler/converter Tx connects with the control
device Rx and vice versa.
Only one serial port can be used at a time. If the front
port is in use, the rear captive screw connector must be
disconnected from the computer or other control device.
Likewise, if the captive screw port is in use, the config
port on the front panel must be disconnected from the
computer or other control device.
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), which signals the
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